diff --git a/pyqtgraph/flowchart/Flowchart.py b/pyqtgraph/flowchart/Flowchart.py
index 5aeeac38..2e7ed0eb 100644
--- a/pyqtgraph/flowchart/Flowchart.py
+++ b/pyqtgraph/flowchart/Flowchart.py
@@ -834,9 +834,9 @@ class FlowchartWidget(dockarea.DockArea):
     def buildMenu(self, pos=None):
         def buildSubMenu(node, rootMenu, subMenus, pos=None):
             for section, node in node.items():
-                menu = QtGui.QMenu(section)
-                rootMenu.addMenu(menu)
-                if isinstance(node, OrderedDict): 
+                if isinstance(node, OrderedDict):
+                    menu = QtGui.QMenu(section)
+                    rootMenu.addMenu(menu)
                     buildSubMenu(node, menu, subMenus, pos=pos)
                     subMenus.append(menu)
                 else: